Trolley-frog approach structure



April 29, 1924. 1,492,151

C. AALBORG I TROLLEY FROG APPROACH STRUCTURE Filed Sept. 12, 1921 Ai'TORNEY Patented Apr. 2%, 124.

CHRISTIAN AALBORG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO "NE-STING- HOUSE ELECTRIC dz MANUFACTURING: CQMPANY, A CORPORATION OF PENNSYL- VANIA.

TROLLEY-FROG APPROACH STRUCTURE.

Application filed September 12, 1921. Serial No. $99,974.

7 '0 (ZZZ whom it may concern:

Be it known that I, CHRISTIAN Antnone, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Trolley Frog Approach Structures, of which the following is a specification.-

My invention relates to trolley-conductor devices such as frogs and crossings, and particularly to renewable therefor.

One object of my invention is to provide a device of the above indicated character that shall be simple and durable in construction, economical to manufacture and effective in operation.

Another object of my invention is to provide a trolley-conductor device that shall comprise only two members at an approach end, which members may be readily placed together in operative position by a simple tool, such as a hammer.

Another object of my invention is to pro vide a trolley-conductor device that shall have a body member and an approach member so co-operatively formed and related as to permit the approach member to be wedged in operative position by a relatively simple movement and prevented from withdrawal from the body member along the conductor.

In practicing my invention, I provide a removable approach member for a frog or other trolley-conductor device,-to take up the shocks and wear incident to the passage of trolley contact members, in which the frog and the approach members are formed and related to permit them to be co-operativel'y engaged without the aid of any other holding members and which, when the approach member is attached to the conductor, are prevented from separation.

Figure 1 of the accompanying drawing is a side elevational view including a portion of the frog or other trolley-conductor device and an approach member embodying my invention, and

Fig. 2 is a plan view of the device shown in Fig. 1.

A frog 1 comprises a body member 2 of substantially channel shape for the recep tion of a conductor 3 and is provided, at the end of each of its side walls, with an upapproach members wardly and outwardly inclined portion 4 having upper and lower surfaces 5 and 6, respectively.

An approach member 7, preferably of malleable material, has an inverted channel portion 8 embracing the conductor 3 and a centrally projecting portion or tongue 9, disposed in the channel above the conductor 3. The approach member 7 is also provided with laterally extending diagonal flange or web portions 10 and 11 for co-operation, respectively, with the surfaces 5 and 6 of the portion 4 on the body member 2..

In mounting the approach member, it is held in .a horizontal position above and to the right. of the body member 2, as'viewed in Fig. 1, and moved in a diagonal direction toward its operative position. Upon being driven home along the above mentioned diagonal path, the websll on the approach member 7 co-operate with. the under surfaces 6 of the body member to tightly wedge the approach member in position relative to the body member and the conductor. During this wedging movement, the tongue 9 and other portions of the approach member are forced downwardly upon the upper sur-- face ofthe conductor, and the bottom of the channel of the body portion is forced upwardly" against the bottom of the conductor. the channel portion 8 are bent around the conductor 3, the approach member '7 cannot be-withdrawn along the conductor from its operative position, in response to vibration caused by passing trolleys, by reason of its interlocking relation with the diagonal portion 4 of the body member but, by unbending the edges 12 of the approach member 7, it may readily be withdrawn.

The device, consisting of two relatively simple metal parts only, is very economical in construction and easy to mount. It fur ther, in contradistinction to cam clamps, provides relatively large clamping surfaces, requires no rotative camclamping movement which, if the parts were not of proper dimensions, might submit the parts to undue or insuflicient clamping forces and embodies no screws, bolts, lugs or other devices to hold it in position.

While I have shown and described a particular form of my invention, changes may When the lower edges 12 of conductor-receiving body member and an approach member co-operating therewith, said body and approach members being formed and related to prevent withdrawal 'of the approach member from the body member along the conductor and to permit withdrawal thereof by a single movement having upward and out-ward direct-ion components relative to the body member.

3. A trolley-conductor device comprising a conductor-receiving body member and an approach member co-operating therewith, said body and approach members being formed and related to prevent withdrawal of the approach member from the body member along the conductor and to permit withdrawal thereof by a non-rotative movement.

4. A trolley-conductor device comprising a conductor-receiving body member and an approach member, one of which is provided with diagonal surfaces and the other of which directly co-operates with said surfaces and the conductor to interlock the approach member in operative position.

5. A trolley-conductor device comprising a conductor-receiving body member having a diagonal under surface, an approach member having a co-operating diagonal upper surface to wedge the approach member between the body member and the conductor, and means for preventing the withdrawal of the approach member along the conductor. r

6. A trolley-conductor device comprising a body member and an approach member having means co-operating with the body member to alone wedge the approach mem ber in position and prevent its withdrawal along the conductor. 7 7

7. A trolley-conductor; device comprising a conductor-receiving body member of substantially chamiel shape having diagonal surfaces on each side of the channel adjacent to its end and an approach member having portions co-operating with said surfaces to tightly engage the body and approach members to the conductor and to prevent withdrawal of the approach member along the conductor.

8. A trolley-conductor device comprising a conductor-receiving body member of substantially channel shape having diagonal surfaces on each side of the channel adjacent to its end and an approach member having co-operating diagonal surfaces to wedge the approach member in position and to prevent its withdrawal along the conductor.

9. A trolley-conductor device comprising a body member of channel shape for the reception of a conductor and having diagonal portions extending upwardly and outwardly at the end of each side of the channel, and an approach member having a por tion of inverted channel shape to be bent around the conductor and a diagonal portion to co-operate with the upper and lower surfaces of each of said diagonal portions of the body member.

10. A trolley-conductor device comprising a body member of channel shape forthe reception of a conductor and having diagonal portions extending upwardly and outwardly at the end of each side ofthe channel, and an approach member having a portion of inverted channel shape to be bent around the conductor and a diagonal portion to co-operate with the upper and lower surfaces of each of said diagonal portions of the body member, said approach member also having a conductor-engaging portion projecting into the channel.

In testimony whereof, I have hereunto subscribed my name this 31st day ofv August, 1921.

CHRISTIAN AALBORG. 

